The Mothman Prophecies by John Keel

For a thirteen month period from November 1966 until December 1967, the town of Point Pleasant, West Virginia, USA was reportedly tipped into a state of chaos - overrun by UFOs, poltergeists, Men in Black in beyond-fashion-clothing driving impeccable old cars and fake service workers -- both groups had dark, sharp features, and wearing thick soled rubber shoes. If that wasn't bad enough, a surrealist abbatoirist left cattle cadavers strewn about the fields of Point Pleasant.

These phenomena appeared to revolve around regular sightings of a winged humanoid known as the 'Mothman'. There were hundreds of alleged witnesses to these phenomena - some claimed 'contact' with various otherworldly beings.

It seemed that anyone even peripherally involved was affected, and
Keel, who had arrived from New York to investigate the reports, was
no exception.

Before long, he was experienced disconcerting sychronicities, such as many of his 'contactee' friends knowing of his future actions *before* he had himself decided on them. His phone line became almost unusable with untraceable interference, tapping, line cutting, crossed lines, harassments, hoax phone calls and dark photographers trailing him round Manhattan. . . "Between the IRS, the phone company. . . and flying saucers I was fast becoming a candidate for the funny farm".
Required reading for any fortean - check out Blather's more lengthy review.